An image synthesis and display apparatus. The apparatus includes a display device, an image pickup device, an extraction unit and a synthesis unit. The display device displays a simulation image to a user, and provides a field of view of the simulation image to the user. The image pickup device detects...http://www.google.co.uk/patents/US5796991?utm_source=gb-gplus-sharePatent US5796991 - Image synthesis and display apparatus and simulation system using same
